Slant is on my list but finding it hard to decide: modern Merkur 37 - but one more Merkur? I already have a Merkur 34 and a Merkur 45, three's company - making vintage possibly my best bet.
I think Italian Barber has a head that has more or less the same geometry, but the bottomedge of the bottomplate is horizontal. I have a razor like that, not sure if it's a "Italian Barber" but please try and keep m apart, but haven't tried it yet.